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(No Model.)

' P. F. WELLS.

SPRING TOOTH.

No. 280,104. Patented June 26.1888.

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` NITED STATES PATENT FFIC.

PHILIP F. VELLS, OF MILFORD, MICHIGAN, ASSIGNOR OF ONFJIIALF TQ H. A. KIIP, OF SAllIE PLACE.

SPRING-TOOTH.

SPECIFICATION forming part of Letters Patent No. 280,104, dated June 26, 1883.

Application filed December 19, i852. (No model.)

T LZZ 'lu/wm it may con/cern:

Be `it known that I, PHILIP F. \VELLS, of Milford, county of Oakland, State oi Michigan, have invented a new and useful Improvement in Spring-Teeth and I declare the following to be a full, clear, and exact description oli' the same, such 'as will enable others skilled in. the art to which it pertains to make and use it, reference being had to the accompanying drawings, which form a part ot' this specification.

This invention relates to improvements in that class of vibratory spring-teeth for harrows and cultivators which are provided with attached points constituting supplemental teeth; and the object of my invention is to provide an improved construction oit' the vibratory springtooth and its separate point, that the latter can be simply attached by a single bolt, and yet be incapable of turning sidewise on such single point of attachment. This object I accomplish in the manner hereinafter described and claimed, and illust-rated in the accompanying drawings, in which- Figure l represents perspective views of the parts detached, and Fig.` 2 is a cross-sectional view through the point where the attachingbolt is arranged.

The vibrator-y spring-tooth A is composed of a thin plate of springmetal, rolled or otherwise formed so that its lower end is conca foconvex, or so that the front side of its lower end is convex, as shown in Fig. 2. The point B is preferably a reversible point adapted to itupon and be firmly secured to the lower part ofthe spring-tooth, and for this purpose it is shaped in a manner similar to that ofthe lower end of the tooththat is to say, the

'point is 'formed of a concave-convex plate of metal, the 'rear concave surface resting upon the front convex` surface of the tooth.

C is a bolt passing through the point and lower end of the tooth. Said point and tooth may be provided either with one or aseries ot' bolt-sockets l'or .the purpose of securing them properly together. constructed and bolted together in the manner described, the point cannot turn sidewise, but will be held irmly to its work. It is obvious, also, that such a construction sti'ilens both. the tooth and the point,so that a much lighter point can be used withoutdanger of breaking.

The flexibility necessary in the tooth necessarily prevents its being too highly tempered; but it is found very advantageous and desirable to temper the point to such a degree that it will readily polishin variouskinds of soil.

By myl invention this can readily be secured without diminishing th e il exi bil ity ol' the tooth iWhat I claim is* l. The flat spring-tooth formed with a transrnnar r. wnLLs.

Vitnesses:

N. s. WRIGHT, N. M. PORTER.

It is evident that when i 

